| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel gas supply method and a device of a gas engine, securing safety by surely and easily preventing abnormal combustion such as self-ignition of fuel gas in an air supply passage including a supercharger outlet, by controlling the amount of fuel gas to be supplied, in the low-calorie fuel gas whose calorific value is likely to vary. <P>SOLUTION: In the gas engine, a gas supply pipe 35 is branched into a supercharger-side gas supply pipe 33 and a cylinder-side gas supply pipe 37, and there are a supercharger-side gas quantity adjusting valve 43 and a cylinder-side gas quantity adjusting valve 45 for controlling passage flow rates. When the concentration of the fuel gas changes, the ratio Q1/Q between the fuel gas quantity Q1 of the supercharger-side gas supply pipe 33 and a fuel gas quantity Q2 of the cylinder-side gas supply pipe 37 has a constant relationship, and a gas supply controller 63 first controls the cylinder-side gas quantity adjusting valve 45 so as to maintain constant engine output, to control the supercharger-side gas quantity adjusting valve 43 so as to achieve the fuel gas quantity Q1 based on the constant ratio. <P>COPYRIGHT: (C)2012,JPO&INPIT |
